Gael coeepee



(No Model.)

G. OOERPER.

ARMATURE FOR DYNAMO ELEUTRIG MAGHINES.

No. 337,558. Patented Mar. 9, 1886.

4 &L 4, 1

& i R K a I q i Afforneyd maz;

UNITED STATES PATENT OFFICE CARL COERPER, OF COLOGNE, GERMANY.

ARMATURE FOR DYNAMO-ELECTRIC MACHlNES.

SPECIFICATION forming part of Letters Patent No. 337.558, date& March 9, 1886.

Application filed June 1,1885. Serial No. 167,l64. No model.) Patented in France June 10, 1882, No. 1G6,972; in Luxcmburg February 1:2, 1885, No. 494; in England February 27, 1885, No. 2,671; in Belgium February 28, 1885, No. 67,835 in Italy March 31. 1885, XLX, 17,915, XXXI, 427, and in Spain April 30, 1885,No. 6,920.

.To aZZ whom it may cocern:

Be it known that I, CARL COERPER, of Cologne, in the Empire of Germany, have in- Vented certain new and useful Inprovements in Armatures for Dynamo-Electric Machines, (which have been patented to me in France, No. 166,972, June lO, 1882; Belgium, No. 67,835, February 28. 1885; England,No. 2,671, February 27, 1885; Luxembnrg, No. 494, February 12, 1885,) of which the following is a specification.

This invention relates to armatures for dynano-electric machines,- and it consists of a flat-ring armature i'or dynano-electric machines, which is made ofa closed ringshaped hollow frame, around which is wound a filling of insulzted wire, said frame being tapering at the inner end and inclosed at the three sides by the pole-peces of the field-magnets. The flat rings are supported on a disk or web of paper attached to the shaft of the armature.

In the accompanying drawings, Figur-es l to ll are cross-sections of pole-pieces of different shapes, all being designed with a View to inclose the armature at the circnmference and sides. Figs. 12 and 13 are vertical transverse sections of my improved armature, shown as arranged with one and two rings; and Fig. 12 is a cross-section of the hollow frame of the armature-ring.

Similar letters of reference indicate corresponding parts.

a a in the drawin'gs represent the polepieces of the field-magnets of, a dynamo-electric nachine, of which one or more may be arranged,according to the number of flat rings of which the armature is composed. The shape of the pole-pieces a a corresponds to the cross-'section of the armature-rings, and is so devised that the pole-pieces surround the armature-rings at three sides-nanely, at the circumference and the two sides adjoining the same-as shown in Figs. l to ll.

The Construction of the armature is illustrated in Figs. 12 and 13 and 12 It consists of a disk or web, d, of paper, a hollow closed ringshaped frame, b, and a. filling of insulated iron wire, which last two form the induction core or ring of the armature. When the armature-ring is made rectangular at its circumference, as shownin Fig. 12,1;he pole-picces have to be made to correspond to the same, as shown in Fig. 4. When they are ronnded off. the pole-pieces correspond thereto, as shown in Fig. 1. Several flat rings may be arranged sidewise of each other on the supporting disk or web d,in which cases the pole-pieces extend in the spaces between the rings, as shown in Figs. 1, 2, and 3. The wires forming the filling of the hollow frame are made of magnet ically or of magnetically and electrically insuI-ated iron wire and then closed at the outer end. The fiat-ring armatnres are made tapering at their inner circumference, so as to reduce the layers of wire not exposed to the eX- citing action of the pole-pieces, and a'e attached to the paper disk or web d by means of screws, clamping-rings, augle-pieces, or othersnitabledevices. (Notshowninthedrawings.) The disk or web d is keyed to the shaft in any approved manner.

Having thus described my invention,Iclaim as new and desire to secure by Letters Patentl. An induction-ring for armatures of dynamo-electric machines, ccnsisting of a closed ring-shaped hollow frame, and of a filling of insulated iron wire in said frame,substantially as set forth.

2. An induction-ring for armatures of dynamo-electric machines, consisting of a closed rng-shaped hollow frame, taperng at its inner circumference, and a filling of insnlated iron wire wound in said frame, substantially as set forth.

3. An armature for dynamo-electric ma` chines, consisting of a supporting web or disk of paper keyed to the center shalt, and one or more flat induction-rings having a tapering inner circumference, said ring or rings being made of a hollow frame and a filling of insnlated iron wire, substantially as set forth.

In testimony that I claim the foregoing as my inventionl have signed my name in pres` ence of two snbscribing witnesses.

CARL COERPER. 

